WEBVTT

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The hydrological cycle

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The hydrological cycle, or water cycle, is the continuous movement of water on, above, and below the Earth's surface.

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It's crucial for replenishing our water resources and supporting life.

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Let's break down the cycle into simple stages.

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1. Evaporation

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Water from oceans, lakes, and rivers heats up due to the sun and turns into vapor.

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For instance, on a sunny day, water from the red sea evaporates into the atmosphere.

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2. Transpiration

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Plants also release water vapor through their leaves into the air.

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Date palms in Saudi Arabia, for example, contribute moisture to the atmosphere this way.

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3. Condensation

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As water vapor rises, it cools down and turns back into liquid droplets, forming clouds.

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This happens over regions like the Arabian Peninsula, where water vapor cools and forms clouds.

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4. Percipitation

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When clouds become heavy, water falls back to the Earth as rain, snow, sleet, or hail.

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In the Asia region, for example, rain replenishes rivers and lakes, which supports agriculture and vegetation.

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5. Collection

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Water then collects embodies like rivers, lakes, and oceans.

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Some water also seeps into the ground and becomes groundwater.

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In Saudi Arabia, rainwater collects in valleys called waddies and underground aquifers, providing essential water in arid areas.

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So, evaporation, transpiration, condensation, precipitation, and collection all work together in this cycle to keep our water resources balanced and our planet healthy.